CSIT-1471: Migrate Dhcp library from VAT to PAPI - csit

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author	Jan Gelety <jgelety@cisco.com>	2019-07-12 17:31:25 +0200
committer	Jan Gelety <jgelety@cisco.com>	2019-07-19 17:52:13 +0000
commit	13bc34ab5a07eff486a8a0d9a1cffa6cbc0b5dc5 (patch)
tree	344fab9ded6d5c92d4d46691ce0ea7476ce8e2cb /tests/vpp/func/ip6/eth2p-ethip6-ip6base-ip6ecmp-func.robot
parent	385f224625afd53e478e6508066e0c0dd5fc108a (diff)

CSIT-1471: Migrate Dhcp library from VAT to PAPI

Change-Id: Ibc9b9b736532cce31994537e632daa4d4e62459c Signed-off-by: Jan Gelety <jgelety@cisco.com>

Diffstat (limited to 'tests/vpp/func/ip6/eth2p-ethip6-ip6base-ip6ecmp-func.robot')

0 files changed, 0 insertions, 0 deletions

/* *------------------------------------------------------------------ * socksvr_vlib.c * * Copyright (c) 2009 Cisco and/or its affiliates. * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at: * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. *------------------------------------------------------------------ */ #include <sys/types.h> #include <sys/socket.h> #include <netinet/in.h> #include <sys/ioctl.h> #include <fcntl.h> #include <sys/stat.h> #include <vppinfra/byte_order.h> #include <svm/ssvm.h> #include <vlibmemory/api.h> #include <vlibmemory/vl_memory_msg_enum.h> #define vl_typedefs /* define message structures */ #include <vlibmemory/vl_memory_api_h.h> #undef vl_typedefs /* instantiate all the print functions we know about */ #define vl_print(handle, ...) vlib_cli_output (handle, __VA_ARGS__) #define vl_printfun #include <vlibmemory/vl_memory_api_h.h> #undef vl_printfun /* instantiate all the endian swap functions we know about */ #define vl_endianfun #include <vlibmemory/vl_memory_api_h.h> #undef vl_endianfun socket_main_t socket_main; void vl_sock_api_dump_clients (vlib_main_t * vm, api_main_t * am) { vl_api_registration_t *reg; socket_main_t *sm = &socket_main; clib_file_t *f; /* * Must have at least one active client, not counting the * REGISTRATION_TYPE_SOCKET_LISTEN bind/accept socket */ if (pool_elts (sm->registration_pool) < 2) return; vlib_cli_output (vm, "Socket clients"); vlib_cli_output (vm, "%20s %8s", "Name", "Fildesc"); /* *INDENT-OFF* */ pool_foreach (reg, sm->registration_pool, ({ if (reg->registration_type == REGISTRATION_TYPE_SOCKET_SERVER) { f = vl_api_registration_file (reg); vlib_cli_output (vm, "%20s %8d", reg->name, f->file_descriptor); } })); /* *INDENT-ON* */ } void vl_socket_api_send (vl_api_registration_t * rp, u8 * elem) { #if CLIB_DEBUG > 1 u32 output_length; #endif socket_main_t *sm = &socket_main; u16 msg_id = ntohs (*(u16 *) elem); api_main_t *am = &api_main; msgbuf_t *mb = (msgbuf_t *) (elem - offsetof (msgbuf_t, data)); vl_api_registration_t *sock_rp; clib_file_t *cf; cf = vl_api_registration_file (rp); ASSERT (rp->registration_type > REGISTRATION_TYPE_SHMEM); if (msg_id >= vec_len (am->api_trace_cfg)) { clib_warning ("id out of range: %d", msg_id); vl_msg_api_free ((void *) elem); return; } sock_rp = pool_elt_at_index (sm->registration_pool, rp->vl_api_registration_pool_index); ASSERT (sock_rp); /* Add the msgbuf_t to the output vector */ vl_socket_add_pending_output_no_flush (cf, sock_rp, (u8 *) mb, sizeof (*mb)); /* Send the message */ vl_socket_add_pending_output (cf, sock_rp, elem, ntohl (mb->data_len)); #if CLIB_DEBUG > 1 output_length = sizeof (*mb) + ntohl (mb->data_len); clib_warning ("wrote %u bytes to fd %d", output_length, cf->file_descriptor); #endif vl_msg_api_free ((void *) elem); } void vl_socket_free_registration_index (u32 pool_index) { int i; vl_api_registration_t *rp; if (pool_is_free_index (socket_main.registration_pool, pool_index)) { clib_warning ("main pool index %d already free", pool_index); return; } rp = pool_elt_at_index (socket_main.registration_pool, pool_index); ASSERT (rp->registration_type != REGISTRATION_TYPE_FREE); for (i = 0; i < vec_len (rp->additional_fds_to_close); i++) if (close (rp->additional_fds_to_close[i]) < 0) clib_unix_warning ("close"); vec_free (rp->additional_fds_to_close); vec_free (rp->name); vec_free (rp->unprocessed_input); vec_free (rp->output_vector); rp->registration_type = REGISTRATION_TYPE_FREE; pool_put (socket_main.registration_pool, rp); } void vl_socket_process_api_msg (clib_file_t * uf, vl_api_registration_t * rp, i8 * input_v) { msgbuf_t *mbp = (msgbuf_t *) input_v; u8 *the_msg = (u8 *) (mbp->data); socket_main.current_uf = uf; socket_main.current_rp = rp; vl_msg_api_socket_handler (the_msg); socket_main.current_uf = 0; socket_main.current_rp = 0; } clib_error_t * vl_socket_read_ready (clib_file_t * uf) { clib_file_main_t *fm = &file_main; vlib_main_t *vm = vlib_get_main (); vl_api_registration_t *rp; int n; i8 *msg_buffer = 0; u8 *data_for_process; u32 msg_len; u32 save_input_buffer_length = vec_len (socket_main.input_buffer); vl_socket_args_for_process_t *a; msgbuf_t *mbp; int mbp_set = 0; rp = pool_elt_at_index (socket_main.registration_pool, uf->private_data); n = read (uf->file_descriptor, socket_main.input_buffer, vec_len (socket_main.input_buffer)); if (n <= 0 && errno != EAGAIN) { clib_file_del (fm, uf); if (!pool_is_free (socket_main.registration_pool, rp)) { u32 index = rp - socket_main.registration_pool; vl_socket_free_registration_index (index); } else { clib_warning ("client index %d already free?", rp->vl_api_registration_pool_index); } return 0; } _vec_len (socket_main.input_buffer) = n; /* * Look for bugs here. This code is tricky because * data read from a stream socket does not honor message * boundaries. In the case of a long message (>4K bytes) * we have to do (at least) 2 reads, etc. */ do { if (vec_len (rp->unprocessed_input)) { vec_append (rp->unprocessed_input, socket_main.input_buffer); msg_buffer = rp->unprocessed_input; } else { msg_buffer = socket_main.input_buffer; mbp_set = 0; } if (mbp_set == 0) { /* Any chance that we have a complete message? */ if (vec_len (msg_buffer) <= sizeof (msgbuf_t)) goto save_and_split; mbp = (msgbuf_t *) msg_buffer; msg_len = ntohl (mbp->data_len); mbp_set = 1; } /* We don't have the entire message yet. */ if (mbp_set == 0 || (msg_len + sizeof (msgbuf_t)) > vec_len (msg_buffer)) { save_and_split: /* if we were using the input buffer save the fragment */ if (msg_buffer == socket_main.input_buffer) { ASSERT (vec_len (rp->unprocessed_input) == 0); vec_validate (rp->unprocessed_input, vec_len (msg_buffer) - 1); clib_memcpy (rp->unprocessed_input, msg_buffer, vec_len (msg_buffer)); _vec_len (rp->unprocessed_input) = vec_len (msg_buffer); } _vec_len (socket_main.input_buffer) = save_input_buffer_length; return 0; } data_for_process = (u8 *) vec_dup (msg_buffer); _vec_len (data_for_process) = (msg_len + sizeof (msgbuf_t)); pool_get (socket_main.process_args, a); a->clib_file = uf; a->regp = rp; a->data = data_for_process; vlib_process_signal_event (vm, vl_api_clnt_node.index, SOCKET_READ_EVENT, a - socket_main.process_args); if (n > (msg_len + sizeof (*mbp))) vec_delete (msg_buffer, msg_len + sizeof (*mbp), 0); else _vec_len (msg_buffer) = 0; n -= msg_len + sizeof (msgbuf_t); msg_len = 0; mbp_set = 0; } while (n > 0); _vec_len (socket_main.input_buffer) = save_input_buffer_length; return 0; } void vl_socket_add_pending_output (clib_file_t * uf, vl_api_registration_t * rp, u8 * buffer, uword buffer_bytes) { clib_file_main_t *fm = &file_main; vec_add (rp->output_vector, buffer, buffer_bytes); if (vec_len (rp->output_vector) > 0) { int skip_update = 0 != (uf->flags & UNIX_FILE_DATA_AVAILABLE_TO_WRITE); uf->flags |= UNIX_FILE_DATA_AVAILABLE_TO_WRITE; if (!skip_update) fm->file_update (uf, UNIX_FILE_UPDATE_MODIFY); } } void vl_socket_add_pending_output_no_flush (clib_file_t * uf, vl_api_registration_t * rp, u8 * buffer, uword buffer_bytes) { vec_add (rp->output_vector, buffer, buffer_bytes); } static void socket_del_pending_output (clib_file_t * uf, vl_api_registration_t * rp, uword n_bytes) { clib_file_main_t *fm = &file_main; vec_delete (rp->output_vector, n_bytes, 0); if (vec_len (rp->output_vector) <= 0) { int skip_update = 0 == (uf->flags & UNIX_FILE_DATA_AVAILABLE_TO_WRITE); uf->flags &= ~UNIX_FILE_DATA_AVAILABLE_TO_WRITE; if (!skip_update) fm->file_update (uf, UNIX_FILE_UPDATE_MODIFY); } } clib_error_t * vl_socket_write_ready (clib_file_t * uf) { clib_file_main_t *fm = &file_main; vl_api_registration_t *rp; int n; rp = pool_elt_at_index (socket_main.registration_pool, uf->private_data); /* Flush output vector. */ n = write (uf->file_descriptor, rp->output_vector, vec_len (rp->output_vector)); if (n < 0) { #if DEBUG > 2 clib_warning ("write error, close the file...\n"); #endif clib_file_del (fm, uf); vl_socket_free_registration_index (rp - socket_main.registration_pool); return 0; } else if (n > 0) socket_del_pending_output (uf, rp, n); return 0; } clib_error_t * vl_socket_error_ready (clib_file_t * uf) { vl_api_registration_t *rp; clib_file_main_t *fm = &file_main; rp = pool_elt_at_index (socket_main.registration_pool, uf->private_data); clib_file_del (fm, uf); vl_socket_free_registration_index (rp - socket_main.registration_pool); return 0; } void socksvr_file_add (clib_file_main_t * fm, int fd) { vl_api_registration_t *rp; clib_file_t template = { 0 }; pool_get (socket_main.registration_pool, rp); memset (rp, 0, sizeof (*rp)); template.read_function = vl_socket_read_ready; template.write_function = vl_socket_write_ready; template.error_function = vl_socket_error_ready; template.file_descriptor = fd; template.private_data = rp - socket_main.registration_pool; rp->registration_type = REGISTRATION_TYPE_SOCKET_SERVER; rp->vl_api_registration_pool_index = rp - socket_main.registration_pool; rp->clib_file_index = clib_file_add (fm, &template); } static clib_error_t * socksvr_accept_ready (clib_file_t * uf) { clib_file_main_t *fm = &file_main; socket_main_t *sm = &socket_main; clib_socket_t *sock = &sm->socksvr_listen_socket; clib_socket_t client; clib_error_t *error; error = clib_socket_accept (sock, &client); if (error) return error; socksvr_file_add (fm, client.fd); return 0; } static clib_error_t * socksvr_bogus_write (clib_file_t * uf) { clib_warning ("why am I here?"); return 0; } /* * vl_api_sockclnt_create_t_handler */ void vl_api_sockclnt_create_t_handler (vl_api_sockclnt_create_t * mp) { vl_api_registration_t *regp; vl_api_sockclnt_create_reply_t *rp; int rv = 0; regp = socket_main.current_rp; ASSERT (regp->registration_type == REGISTRATION_TYPE_SOCKET_SERVER); regp->name = format (0, "%s%c", mp->name, 0); rp = vl_msg_api_alloc (sizeof (*rp)); rp->_vl_msg_id = htons (VL_API_SOCKCLNT_CREATE_REPLY); rp->handle = (uword) regp; rp->index = (uword) regp->vl_api_registration_pool_index; rp->context = mp->context; rp->response = htonl (rv); vl_api_send_msg (regp, (u8 *) rp); } /* * vl_api_sockclnt_delete_t_handler */ void vl_api_sockclnt_delete_t_handler (vl_api_sockclnt_delete_t * mp) { vl_api_registration_t *regp; vl_api_sockclnt_delete_reply_t *rp; if (!pool_is_free_index (socket_main.registration_pool, mp->index)) { regp = pool_elt_at_index (socket_main.registration_pool, mp->index); rp = vl_msg_api_alloc (sizeof (*rp)); rp->_vl_msg_id = htons (VL_API_SOCKCLNT_DELETE_REPLY); rp->handle = mp->handle; rp->response = htonl (1); vl_api_send_msg (regp, (u8 *) rp); vl_api_registration_del_file (regp); vl_socket_free_registration_index (mp->index); } else { clib_warning ("unknown client ID %d", mp->index); } } clib_error_t * vl_sock_api_send_fd_msg (int socket_fd, int fd_to_share) { struct msghdr mh = { 0 }; struct iovec iov[1]; char ctl[CMSG_SPACE (sizeof (int))]; char *msg = "memfd"; int rv; iov[0].iov_base = msg; iov[0].iov_len = strlen (msg); mh.msg_iov = iov; mh.msg_iovlen = 1; struct cmsghdr *cmsg; memset (&ctl, 0, sizeof (ctl)); mh.msg_control = ctl; mh.msg_controllen = sizeof (ctl); cmsg = CMSG_FIRSTHDR (&mh); cmsg->cmsg_len = CMSG_LEN (sizeof (int)); cmsg->cmsg_level = SOL_SOCKET; cmsg->cmsg_type = SCM_RIGHTS; memcpy (CMSG_DATA (cmsg), &fd_to_share, sizeof (int)); rv = sendmsg (socket_fd, &mh, 0); if (rv < 0) return clib_error_return_unix (0, "sendmsg"); return 0; } vl_api_shm_elem_config_t * vl_api_make_shm_config (vl_api_sock_init_shm_t * mp) { vl_api_shm_elem_config_t *config = 0, *c; u64 cfg; int i; if (!mp->nitems) { vec_validate (config, 6); config[0].type = VL_API_VLIB_RING; config[0].size = 256; config[0].count = 32; config[1].type = VL_API_VLIB_RING; config[1].size = 1024; config[1].count = 16; config[2].type = VL_API_VLIB_RING; config[2].size = 4096; config[2].count = 2; config[3].type = VL_API_CLIENT_RING; config[3].size = 256; config[3].count = 32; config[4].type = VL_API_CLIENT_RING; config[4].size = 1024; config[4].count = 16; config[5].type = VL_API_CLIENT_RING; config[5].size = 4096; config[5].count = 2; config[6].type = VL_API_QUEUE; config[6].count = 128; config[6].size = sizeof (uword); } else { vec_validate (config, mp->nitems - 1); for (i = 0; i < mp->nitems; i++) { cfg = mp->configs[i]; /* Pretty much a hack but it avoids defining our own api type * in memclnt.api */ c = (vl_api_shm_elem_config_t *) & cfg; config[i].type = c->type; config[i].count = c->count; config[i].size = c->size; } } return config; } /* * Bootstrap shm api using the socket api */ void vl_api_sock_init_shm_t_handler (vl_api_sock_init_shm_t * mp) { vl_api_sock_init_shm_reply_t *rmp; ssvm_private_t _memfd_private, *memfd = &_memfd_private; svm_map_region_args_t _args, *a = &_args; vl_api_registration_t *regp; api_main_t *am = &api_main; svm_region_t *vlib_rp; clib_file_t *cf; vl_api_shm_elem_config_t *config = 0; vl_shmem_hdr_t *shmem_hdr; int rv; regp = vl_api_client_index_to_registration (mp->client_index); if (regp == 0) { clib_warning ("API client disconnected"); return; } if (regp->registration_type != REGISTRATION_TYPE_SOCKET_SERVER) { rv = -31; /* VNET_API_ERROR_INVALID_REGISTRATION */ goto reply; } /* * Set up a memfd segment of the requested size wherein the * shmem data structures will be initialized */ memset (memfd, 0, sizeof (*memfd)); memfd->ssvm_size = mp->requested_size; memfd->requested_va = 0ULL; memfd->i_am_master = 1; memfd->name = format (0, "%s%c", regp->name, 0); if ((rv = ssvm_master_init_memfd (memfd))) goto reply; /* Remember to close this fd when the socket connection goes away */ vec_add1 (regp->additional_fds_to_close, memfd->fd); /* * Create a plausible svm_region in the memfd backed segment */ memset (a, 0, sizeof (*a)); a->baseva = memfd->sh->ssvm_va + MMAP_PAGESIZE; a->size = memfd->ssvm_size - MMAP_PAGESIZE; /* $$$$ might want a different config parameter */ a->pvt_heap_size = am->api_pvt_heap_size; a->flags = SVM_FLAGS_MHEAP; svm_region_init_mapped_region (a, (svm_region_t *) a->baseva); /* * Part deux, initialize the svm_region_t shared-memory header * api allocation rings, and so on. */ config = vl_api_make_shm_config (mp); vlib_rp = (svm_region_t *) a->baseva; vl_init_shmem (vlib_rp, config, 1 /* is_vlib (dont-care) */ , 1 /* is_private */ ); /* Remember who created this. Needs to be post vl_init_shmem */ shmem_hdr = (vl_shmem_hdr_t *) vlib_rp->user_ctx; shmem_hdr->clib_file_index = vl_api_registration_file_index (regp); vec_add1 (am->vlib_private_rps, vlib_rp); memfd->sh->ready = 1; vec_free (config); /* Recompute the set of input queues to poll in memclnt_process */ vec_reset_length (vl_api_queue_cursizes); reply: rmp = vl_msg_api_alloc (sizeof (*rmp)); rmp->_vl_msg_id = htons (VL_API_SOCK_INIT_SHM_REPLY); rmp->context = mp->context; rmp->retval = htonl (rv); vl_api_send_msg (regp, (u8 *) rmp); if (rv != 0) return; /* * We need the reply message to make it out the back door * before we send the magic fd message so force a flush */ cf = vl_api_registration_file (regp); cf->write_function (cf); /* Send the magic "here's your sign (aka fd)" socket message */ vl_sock_api_send_fd_msg (cf->file_descriptor, memfd->fd); } #define foreach_vlib_api_msg \ _(SOCKCLNT_CREATE, sockclnt_create) \ _(SOCKCLNT_DELETE, sockclnt_delete) \ _(SOCK_INIT_SHM, sock_init_shm) clib_error_t * vl_sock_api_init (vlib_main_t * vm) { clib_file_main_t *fm = &file_main; clib_file_t template = { 0 }; vl_api_registration_t *rp; socket_main_t *sm = &socket_main; clib_socket_t *sock = &sm->socksvr_listen_socket; clib_error_t *error; /* If not explicitly configured, do not bind/enable, etc. */ if (sm->socket_name == 0) return 0; #define _(N,n) \ vl_msg_api_set_handlers(VL_API_##N, #n, \ vl_api_##n##_t_handler, \ vl_noop_handler, \ vl_api_##n##_t_endian, \ vl_api_##n##_t_print, \ sizeof(vl_api_##n##_t), 1); foreach_vlib_api_msg; #undef _ vec_resize (sm->input_buffer, 4096); sock->config = (char *) sm->socket_name; /* mkdir of file socket, only under /run */ if (strncmp (sock->config, "/run", 4) == 0) { u8 *tmp = format (0, "%s", sock->config); int i = vec_len (tmp); while (i && tmp[--i] != '/') ; tmp[i] = 0; if (i) vlib_unix_recursive_mkdir ((char *) tmp); vec_free (tmp); } sock->flags = CLIB_SOCKET_F_IS_SERVER | CLIB_SOCKET_F_SEQPACKET | CLIB_SOCKET_F_ALLOW_GROUP_WRITE; error = clib_socket_init (sock); if (error) return error; pool_get (sm->registration_pool, rp); memset (rp, 0, sizeof (*rp)); rp->registration_type = REGISTRATION_TYPE_SOCKET_LISTEN; template.read_function = socksvr_accept_ready; template.write_function = socksvr_bogus_write; template.file_descriptor = sock->fd; template.private_data = rp - sm->registration_pool; rp->clib_file_index = clib_file_add (fm, &template); return 0; } static clib_error_t * socket_exit (vlib_main_t * vm) { socket_main_t *sm = &socket_main; vl_api_registration_t *rp; /* Defensive driving in case something wipes out early */ if (sm->registration_pool) { u32 index; /* *INDENT-OFF* */ pool_foreach (rp, sm->registration_pool, ({ vl_api_registration_del_file (rp); index = rp->vl_api_registration_pool_index; vl_socket_free_registration_index (index); })); /* *INDENT-ON* */ } return 0; } VLIB_MAIN_LOOP_EXIT_FUNCTION (socket_exit); static clib_error_t * socksvr_config (vlib_main_t * vm, unformat_input_t * input) { socket_main_t *sm = &socket_main; while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT) { if (unformat (input, "socket-name %s", &sm->socket_name)) ; else if (unformat (input, "default")) { sm->socket_name = format (0, "%s%c", API_SOCKET_FILE, 0); } else { return clib_error_return (0, "unknown input '%U'", format_unformat_error, input); } } return 0; } VLIB_CONFIG_FUNCTION (socksvr_config, "socksvr"); clib_error_t * vlibsocket_init (vlib_main_t * vm) { return 0; } VLIB_INIT_FUNCTION (vlibsocket_init); /* * fd.io coding-style-patch-verification: ON * * Local Variables: * eval: (c-set-style "gnu") * End: */


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